Cisco Cisco Expressway
Domain names
Domain shared with Lync
Address 2 … 5
Use these fields only if Lync Server uses more than one DNS server
Domain names 2
… 5
… 5
Use these fields only if Lync Server uses more than one DNS server; configure with the
domain shared with Lync
domain shared with Lync
4. Configure the next available Per-domain DNS server address to contain the IP address of the Lync
Front End Processor, and specify the Lync domain e.g. ciscotp.com as the associated Domain name.
(This is required in some network setups: Lync frequently embeds hostnames inside contact headers and
sometimes these can be unresolvable outside of the Windows domain.)
(This is required in some network setups: Lync frequently embeds hostnames inside contact headers and
sometimes these can be unresolvable outside of the Windows domain.)
5. Click Save.
Ensure that Local hostname and DNS domain are configured
For each "Lync gateway" Expressway peer, ensure that a unique Local host name is set up and that the DNS
Domain name is set up:
Domain name is set up:
1. Go to
System > DNS
and set:
a. Local host name to a unique hostname for this Expressway.
b. Domain name to the domain name for this Expressway.
b. Domain name to the domain name for this Expressway.
2. Click Save.
Note that:
n
the Local host name concatenated with DNS Domain name is the routable FQDN of this Expressway.
n
if these items are not configured and the connection between Lync Server and Expressway is TLS, then
although the neighbor zone goes active and Expressway can send messaging to Lync Server, Lync Server
will never open a TLS connection back to Expressway, resulting in no calls from Lync to Expressway and
other strange behavior.
although the neighbor zone goes active and Expressway can send messaging to Lync Server, Lync Server
will never open a TLS connection back to Expressway, resulting in no calls from Lync to Expressway and
other strange behavior.
"Lync gateway" Expressway: Ensure that cluster name is configured
Lync will be configured with a static route that uses the "Lync gateway" Expressway's cluster name / FQDN
(e.g. lyncexp.ciscotp.com) regardless of whether the "Lync gateway" Expressway is part of a cluster or not.
(e.g. lyncexp.ciscotp.com) regardless of whether the "Lync gateway" Expressway is part of a cluster or not.
For each "Lync gateway" Expressway peer, ensure that Cluster name (
System > Clustering
) is the same,
and is set up to be the FQDN of the cluster. Note that this should have been set up when the cluster was
created – see Expressway Cluster Creation and Maintenance Deployment Guide. If the cluster name needs
changing follow the procedure in that document.
created – see Expressway Cluster Creation and Maintenance Deployment Guide. If the cluster name needs
changing follow the procedure in that document.
"Lync gateway" Expressway: Configure an NTP server
On each "Lync gateway" Expressway peer:
1. Go to
System > Time
.
2. Set NTP server 1 to the IP address of an NTP server.
3. Optionally set NTP server 2 to the IP address of an additional NTP server.
4. Set Time zone as appropriate to the location of the Expressway.
You can find out which time server that the Windows server (the Lync Server) is using by typing
‘net time /querysntp’ from the windows command line.
‘net time /querysntp’ from the windows command line.
Microsoft Lync and Cisco Expressway Deployment Guide (X8.2)
Page 28 of 67
Enabling endpoints registered on the video network to call clients registered on Lync